Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
αποστερήσεισ disregard LXX.Deut.24.14
αποστέρξεισ disregard LXX.Deut.15.7

Liddell-Scott-Jones

ἀποστέργω (apostergō) to disregard G:V

ἀποστέργω,

get rid of love, love no more, [Refs 3rd c.BC+]; loath, reject, τι [Refs 4th c.BC+]; ἀοιδάν[Refs 3rd c.BC+]

__II empty of love, harden, καρδίαν[LXX]

LSJ Scripture Refs: LXX.Deut.15.7